Quick insertion type oil pipe self-sealing device

Abstract

The utility model relates to the technical field of oil pipe self-sealing, in particular to a quick-insertion type oil pipe self-sealing device. According to the technical scheme, the notch side of a sealing rubber core body and a sealing rubber core split body are connected into a whole and are arranged on the outer side of an oil pipe in a sleeving mode; a quick-insertion connecting flange body is installed on the upper side of the sealing rubber core body and the upper side of the sealing rubber core split body, one or more sets of self-locking dovetail grooves are formed in the notch side of the quick-insertion connecting flange body, and self-locking dovetail protrusions are arranged on the two sides of the extending end of a quick-insertion connector respectively. The quick-plug connector is connected with the self-locking dovetail groove of the quick-plug connecting flange body in a matched mode through the self-locking dovetail protrusion. The sealing rubber core has the advantages that the sealing rubber core body and the sealing rubber core split bodies are inserted into the rectangular notches through the rectangular protrusions to form the integral sealing rubber core, the quick-plug connector and the quick-plug connecting flange body are quickly connected in an inserted mode through the self-locking dovetail and installed on the upper surface of the integral sealing rubber core, quick connection can be achieved, and the sealing rubber core is simple in structure and convenient to use. The service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pipe self-sealing, in particular to a quick-insertion oil pipe self-sealing device. Background Art

[0002] During oil and gas testing and well repair operations in oil fields, self-sealing well sealers are important wellhead devices. During operations, after the oil pipe is lowered or when drilling again, self-sealing well sealers are used to prevent the oil in the well from being brought out of the well. The shell and rubber core of existing self-sealing well sealers are both integral structures, and their operation requires actions such as loading and unloading the tubing, lifting and lowering the self-sealing, and removing the hanging card to complete. Generally, oil wells now use 89 oil pipes on the top and 73 oil pipes on the bottom, so there will be a need for replacement in the middle of the operation. Since the self-sealing well sealer is an integral structure, it requires a tong and a driller, and many people are needed to cooperate in the operation to complete the replacement. There are relatively large safety hazards in the replacement process, and the construction cost is also increased. This is the disadvantage of existing self-sealing well sealers.

[0003] Chinese Patent No. 200720092036.2, entitled "Split Valve Self-Sealing Device," comprises a housing and a rubber core. The rubber core is enclosed within the housing. The housing is a split structure, consisting of two symmetrical semicircular shells connected at one end by a rotating shaft and equipped with a locking mechanism at the other end. The rubber core can be either integral or split, consisting of two symmetrical semicircular shells. The housing and rubber core of this utility model utilize a symmetrical split structure, and the rubber core utilizes a plug-in connection. This novel structure allows for easy assembly and disassembly, simplifying the assembly and disassembly process. This is particularly advantageous for quick and convenient installation at the wellhead during special circumstances such as well kicks and blowouts. However, the rubber core utilizes a plug-in connection, with one end of the semicircular shells connected by a rotating shaft and the other end equipped with a locking mechanism. This makes the rubber core inconvenient to operate, sometimes resulting in poor docking and poor connection efficiency. Furthermore, the locking mechanism is complex and can reduce its lifespan due to frequent use. Utility Model Content

[0004] The purpose of the present invention is to address the above-mentioned defects in the prior art and provide a quick-plug oil pipe self-sealing device, which can achieve quick plug-in through a smaller quick-plug connector and a quick-plug connecting flange body through self-locking dovetail protrusions and self-locking dovetail grooves. The two are split structures, and the sealing rubber core body and the sealing rubber core split are in contact with each other through the body section and the split section. The middle part is inserted into the rectangular notch through the rectangular protrusion to form an integral sealing rubber core, thereby achieving quick connection. It has a simple structure, is easy to operate, and has a long service life.

[0005] The utility model mentions a quick-plug oil pipe self-sealing device, and its technical solution is: it includes a quick-plug connection flange body, which also includes a quick-plug joint, a sealing rubber core body and a sealing rubber core split. The notch side of the sealing rubber core body is connected to the sealing rubber core split to form a whole, and is sleeved on the outside of the oil pipe; the quick-plug connection flange body is installed on the upper side of the sealing rubber core body and the sealing rubber core split, and more than one group of self-locking dovetail grooves are provided on the notch side of the quick-plug connection flange body, and self-locking dovetail protrusions are respectively provided on both sides of the protruding end of the quick-plug joint. The quick-plug joint is connected with the self-locking dovetail groove of the quick-plug connection flange body through the self-locking dovetail protrusion, so as to realize the matching connection between the quick-plug joint and the quick-plug connection flange body.

[0006] Preferably, a main body section is provided on one side of the above-mentioned sealing rubber core body, and a rectangular notch is provided in the middle of the main body section; a split section is provided on one side of the sealing rubber core split, and a rectangular protrusion is provided in the middle of the split section. The main body section contacts and cooperates with the split section, and the middle part is inserted into the rectangular notch through the rectangular protrusion, so that the sealing rubber core body and the sealing rubber core split are combined to form an integral sealing rubber core, and a circular oil pipe sealing cavity is provided in the center of the integral sealing rubber core.

[0007] Preferably, a sealing ring installation groove is provided on the outer side of the above-mentioned integral sealing rubber core.

[0008] Preferably, the lower part of the above-mentioned integral sealing rubber core is the protruding end, which is used to be installed in the center hole of the wellhead device; the upper side of the integral sealing rubber core is the fixed end, which is used to be pressed on the wellhead device, and guide holes are respectively provided at the upper and lower ends of the protruding end, and an annular lubrication groove is provided in the middle of the inner wall of the protruding end.

[0009] Preferably, the above-mentioned quick-connect flange body and the quick-connect connector are connected to form an integral flange, a sealing rubber core installation groove is provided in the middle of the integral flange, and more than one circle of sealing ring protrusions are provided in the middle of the sealing rubber core installation groove, and the sealing ring protrusions are cooperatively connected with the sealing ring installation groove.

[0010] Preferably, a flange center hole is provided at the center of the sealing rubber core installation groove, and a flange sealing groove is provided on the upper surface of the integral flange.

[0011] The beneficial effects of the present invention are as follows: the sealing rubber core body and the sealing rubber core split of the present invention are in contact with each other through the body section and the split section, and the middle part is inserted into the rectangular notch through the rectangular protrusion to form an integral sealing rubber core. Then, a smaller quick-plug connector and the quick-plug connection flange body can be quickly plugged in through the self-locking dovetail protrusion and the self-locking dovetail groove, and are installed on the upper surface of the integral sealing rubber core to achieve quick connection. The two are a split structure with a simple structure, easy operation and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1It is a schematic diagram of the quick-connect flange body and quick-connect connector of the present invention;

[0013] Figure 2 It is a structural diagram of the quick-connect flange body and the quick-connect connector installed together;

[0014] Figure 3 It is a side cross-sectional diagram of the quick-connect flange body and the quick-connect connector installed together;

[0015] Figure 4 It is a schematic diagram of the sealant core body and the sealant core separation;

[0016] Figure 5 It is a schematic diagram of the dispersed structure of the utility model;

[0017] Figure 6 This is a schematic diagram of the dispersed structure of the utility model from another angle;

[0018] Figure 7 This is a schematic diagram of the overall structure of the utility model installed on the oil pipe;

[0019] In the figure: quick-connect flange body 1, quick-connect fitting 2, sealant core body 3, sealant core split body 4, self-locking dovetail protrusion 5, self-locking dovetail groove 6, bolt connection hole 7, wellhead assembly 8, oil pipe 9, sealant core mounting groove 1.1, sealing ring protrusion 1.2, flange sealing groove 1.3, flange center hole 1.4, rectangular notch 3.1, rectangular protrusion 3.2, circular oil pipe sealing cavity 3.3, sealing ring mounting groove 3.4, body section 3.5, split body section 3.6, fixed end 3.7, extension end 3.8, guide hole 3.9, annular lubrication groove 3.10. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0021] Example 1, with reference to Figure 1-Figure 7The utility model mentions a quick-plug oil pipe self-sealing device, which includes a quick-plug connection flange body 1, a quick-plug joint 2, a sealing rubber core body 3 and a sealing rubber core split 4. The notch side of the sealing rubber core body 3 is connected to the sealing rubber core split 4 to form a whole and is sleeved on the outside of the oil pipe 9; the quick-plug connection flange body 1 is installed on the upper side of the sealing rubber core body 3 and the sealing rubber core split 4, and one or more self-locking dovetail grooves 6 are provided on the notch side of the quick-plug connection flange body 1, and self-locking dovetail protrusions 5 are respectively provided on both sides of the protruding end of the quick-plug joint 2. The quick-plug joint 2 is connected with the self-locking dovetail grooves 6 of the quick-plug connection flange body 1 through the self-locking dovetail protrusions 5 to achieve the matching connection between the quick-plug joint 2 and the quick-plug connection flange body 1; bolt connection holes 7 are evenly distributed on the outside of the quick-plug connection flange body 1 and the quick-plug joint 2, and the quick-plug connection flange body 1, the quick-plug joint 2, the sealing rubber core body 3 and the sealing rubber core split 4 are firmly fixed on the wellhead device 8 by bolt connection.

[0022] Reference Figure 4 The sealing rubber core body 3 mentioned in the present invention is provided with a main body section 3.5 on one side, and a rectangular notch 3.1 is provided in the middle of the main body section 3.5; a split section 3.6 is provided on one side of the sealing rubber core split 4, and a rectangular protrusion 3.2 is provided in the middle of the split section 3.6. The main body section 3.5 contacts and cooperates with the split section 3.6, and the middle part is inserted into the rectangular notch 3.1 through the rectangular protrusion 3.2, so that the sealing rubber core body 3 and the sealing rubber core split 4 are combined to form an integral sealing rubber core, and a circular oil pipe sealing cavity 3.3 is provided in the center of the integral sealing rubber core.

[0023] Wherein, a sealing ring installation groove 3.4 is provided on the outer side of the above-mentioned integral sealing rubber core.

[0024] In addition, the lower portion of the integral sealant core is an extension end 3.8 for installation in the center hole of the wellhead assembly 8; the upper side of the integral sealant core is a fixed end 3.7 for pressing against the wellhead assembly 8. Guide holes 3.9 are respectively provided at the upper and lower ends of the extension end 3.8, and an annular lubrication groove 3.10 is provided in the middle of the inner wall of the extension end 3.8.

[0025] Reference Figure 1 and Figure 3 The quick-connect flange body 1 and the quick-connect connector 2 mentioned in the present invention are connected as an integral flange. A sealing rubber core mounting groove 1.1 is provided in the middle of the integral flange. More than one circle of sealing ring protrusions 1.2 are provided in the middle of the sealing rubber core mounting groove 1.1. The sealing ring protrusions 1.2 are matched and connected with the sealing ring mounting groove 3.4.

[0026] A flange center hole 1.4 is provided at the center of the sealing rubber core installation groove 1.1, and a flange sealing groove 1.3 is provided on the upper surface of the integral flange.

[0027] When using the present invention, the first step is to install the larger portion of the sealant core body 3 on one side of the oil pipe 9 of the wellhead assembly 8, and then insert the rectangular protrusion 3.2 of the smaller portion of the sealant core split 4 into the rectangular notch 3.1 of the sealant core body 3, so that the body section 3.5 and the split section 3.6 are in contact and fit, so that the sealant core body 3 and the sealant core split 4 are combined to form an integral sealant core, which is then sheathed on the outside of the oil pipe 9;

[0028] In the second step, the quick-connect flange body 1 is inserted into the outer side of the oil pipe 9 and installed on the upper surface of the integral sealing rubber core, and the sealing ring protrusion 1.2 is matched with the sealing ring installation groove 3.4 of the integral sealing rubber core. Then, the smaller quick-connect connector 2 is matched with the self-locking dovetail protrusion 5 and the self-locking dovetail groove 6 of the quick-connect flange body 1 to achieve a quick connection between the quick-connect connector 2 and the quick-connect flange body 1;

[0029] Step 3: Refer to Figure 7 Align the quick-connect flange body 1, quick-connect joint 2, integral sealing rubber core and wellhead device 8 with the bolt connection hole 7, and fix the quick-connect flange body 1, quick-connect joint 2, sealing rubber core body 3 and sealing rubber core split 4 firmly on the wellhead device 8 through bolt connection. It should be noted that Figure 7 The bolts are not shown; after that, the operation of tripping the oil pipe 9 can be carried out.

[0030] Example 2, the utility model mentions a quick-plug oil pipe self-sealing device, including a quick-plug connection flange body 1, a quick-plug joint 2, a sealing rubber core body 3 and a sealing rubber core split 4, the notch side of the sealing rubber core body 3 is connected to the sealing rubber core split 4 to form a whole, and is sleeved on the outside of the oil pipe 9; the quick-plug connection flange body 1 is installed on the upper side of the sealing rubber core body 3 and the sealing rubber core split 4, and more than one group of self-locking dovetail grooves 6 are provided on the notch side of the quick-plug connection flange body 1, and self-locking dovetail protrusions 5 are respectively provided on both sides of the protruding end of the quick-plug joint 2, and the quick-plug joint 2 is connected with the self-locking dovetail grooves 6 of the quick-plug connection flange body 1 through the self-locking dovetail protrusions 5 to realize the matching connection between the quick-plug joint 2 and the quick-plug connection flange body 1; bolt connection holes 7 are evenly distributed on the outside of the quick-plug connection flange body 1 and the quick-plug joint 2, and the quick-plug connection flange body 1, the quick-plug joint 2, the sealing rubber core body 3 and the sealing rubber core split 4 are firmly fixed on the wellhead device 8 by bolt connection.

[0031] The difference from Example 1 is:

[0032] The quick-connect connector 2 is one-sixth to one-quarter the size of the entire circle, which makes operation more convenient and facilitates quick connection.

[0033] The above description is merely a preferred embodiment of the present invention. Anyone skilled in the art may utilize the above-described technical solutions to modify the present invention or create equivalent technical solutions. Therefore, any simple modifications or equivalent transformations based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A quick-insert oil pipe self-sealing device, comprising a quick-insert connection flange body (1), characterized in that: The invention also includes a quick-connect joint (2), a sealing rubber core body (3) and a sealing rubber core split (4), wherein the notch side of the sealing rubber core body (3) is connected to the sealing rubber core split (4) to form a whole and is sleeved on the outside of the oil pipe (9); a quick-connect flange body (1) is installed on the upper side of the sealing rubber core body (3) and the sealing rubber core split (4), and one or more self-locking dovetail grooves (6) are provided on the notch side of the quick-connect flange body (1), and self-locking dovetail protrusions (5) are respectively provided on both sides of the protruding end of the quick-connect joint (2), and the quick-connect joint (2) is connected to the self-locking dovetail grooves (6) of the quick-connect flange body (1) through the self-locking dovetail protrusions (5), thereby realizing the matching connection between the quick-connect joint (2) and the quick-connect flange body (1).

2. The quick-insert oil pipe self-sealing device according to claim 1, characterized in that: A main body section (3.5) is provided on one side of the sealing rubber core body (3), and a rectangular notch (3.1) is provided in the middle of the main body section (3.5); a split section (3.6) is provided on one side of the sealing rubber core split (4), and a rectangular protrusion (3.2) is provided in the middle of the split section (3.6); the main body section (3.5) and the split section (3.6) are in contact and fit with each other, and the middle part is inserted into the rectangular notch (3.1) through the rectangular protrusion (3.2), so that the sealing rubber core body (3) and the sealing rubber core split (4) are combined to form an integral sealing rubber core, and a circular oil pipe sealing cavity (3.3) is provided in the center of the integral sealing rubber core.

3. The quick-insert oil pipe self-sealing device according to claim 2, characterized in that: A sealing ring installation groove (3.4) is provided on the outer side of the integral sealing rubber core.

4. The quick-insert oil pipe self-sealing device according to claim 3, characterized in that: The lower portion of the integral sealing rubber core is a protruding end (3.8) for being installed in the central hole of the wellhead device (8); the upper side of the integral sealing rubber core is a fixed end (3.7) for being pressed onto the wellhead device (8); guide holes (3.9) are respectively provided at the upper and lower ends of the protruding end (3.8); and an annular lubrication groove (3.10) is provided in the middle of the inner wall of the protruding end (3.8).

5. The quick-insert oil pipe self-sealing device according to claim 4, characterized in that: The quick-connect flange body (1) and the quick-connect connector (2) are connected to form an integral flange. A sealing rubber core installation groove (1.1) is provided in the middle of the integral flange. More than one circle of sealing ring protrusions (1.2) are provided in the middle of the sealing rubber core installation groove (1.1). The sealing ring protrusions (1.2) are cooperatively connected with the sealing ring installation groove (3.4).

6. The quick-insert oil pipe self-sealing device according to claim 5, characterized in that: A flange center hole (1.4) is provided at the center of the sealing rubber core installation groove (1.1), and a flange sealing groove (1.3) is provided on the upper surface of the integral flange.

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